getOrganization() methods in segments have wrong return type
All `getOrganization()` methods in segments return `bool` instead of `ElementsOrganization`, see e.g. [Ellpack.h](https://mmg-gitlab.fjfi.cvut.cz/gitlab/tnl/tnl-dev/-/blob/develop/src/TNL/Algorithms/Segments/Ellpack.h#L33)
issue